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Supplemental Information on Oil and Natural Gas Operations (Unaudited) - Narrative (Details) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2021 MBoe $ / bbl $ / MMBTU $ / Mcf | Sep. 30, 2021 MBoe $ / bbl $ / Mcf $ / MMBTU
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |
Oil and natural gas liquids, average WTI intermediate spot price (USD per bbl) | $ / bbl |  | 57.64
Gas, average henry hub spot price (USD per mmbtu) | $ / MMBTU |  | 2.94
Revisions | MBoe | 133 | 4,772
Extensions and discoveries | MBoe | 2,026 | 13,759
Result of drilling successful wells that were previously classified as unproved locations | MBoe |  | 6,564
Result of drilling successful wells offsetting locations that were previously unproven locations | MBoe |  | 7,195
West Texas Intermediate (WTI) |  |
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |
Oil and natural gas liquids, average WTI intermediate spot price (USD per bbl) | $ / bbl | 66.55 |
Henry Hub |  |
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |
Gas, average henry hub spot price (USD per mmbtu) | $ / MMBTU | 3.60 |
Oil |  |
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |
Percentage of reserves | 64.10% | 64.10%
Price (USD per bbl/mcf) | $ / bbl | 64.60 | 55.73
Natural Gas |  |
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |
Percentage of reserves | 17.60% | 17.60%
Price (USD per bbl/mcf) | $ / Mcf | 1.65 | 0.99
NGLs |  |
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |
Percentage of reserves | 18.30% | 18.30%
Price (USD per bbl/mcf) | $ / bbl | 13.75 | 9.83

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